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# frozen_string_literal: true
require 'spec_helper'
describe Projects::GrafanaApiController do
let_it_be(:project) { create(:project) }
let_it_be(:user) { create(:user) }
before do
project.add_reporter(user)
sign_in(user)
end
describe 'GET #proxy' do
let(:proxy_service) { instance_double(Grafana::ProxyService) }
let(:params) do
{
namespace_id: project.namespace.full_path,
project_id: project.name,
proxy_path: 'api/v1/query_range',
datasource_id: '1',
query: 'rate(relevant_metric)',
start: '1570441248',
end: '1570444848',
step: '900'
}
end
before do
allow(Grafana::ProxyService).to receive(:new).and_return(proxy_service)
allow(proxy_service).to receive(:execute).and_return(service_result)
end
shared_examples_for 'error response' do |http_status|
it "returns #{http_status}" do
get :proxy, params: params
expect(response).to have_gitlab_http_status(http_status)
expect(json_response['status']).to eq('error')
expect(json_response['message']).to eq('error message')
end
end
context 'with a successful result' do
let(:service_result) { { status: :success, body: '{}' } }
it 'returns a grafana datasource response' do
get :proxy, params: params
expect(Grafana::ProxyService)
.to have_received(:new)
.with(project, '1', 'api/v1/query_range',
params.slice(:query, :start, :end, :step).stringify_keys)
expect(response).to have_gitlab_http_status(:ok)
expect(json_response).to eq({})
end
end
context 'when the request is still unavailable' do
let(:service_result) { nil }
it 'returns 204 no content' do
get :proxy, params: params
expect(response).to have_gitlab_http_status(:no_content)
expect(json_response['status']).to eq('processing')
expect(json_response['message']).to eq('Not ready yet. Try again later.')
end
end
context 'when an error has occurred' do
context 'with an error accessing grafana' do
let(:service_result) do
{
http_status: :service_unavailable,
status: :error,
message: 'error message'
}
end
it_behaves_like 'error response', :service_unavailable
end
context 'with a processing error' do
let(:service_result) do
{
status: :error,
message: 'error message'
}
end
it_behaves_like 'error response', :bad_request
end
end
end
end
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